Guitar rack



FIG. 1 is a perspective view of a guitar rack, showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The broken line showing of the guitars is for the purpose of illustrating environmental structures that form no part of the claimed design. 

CLAIM The ornamental design for a guitar rack, as shown and described. 